mmioWrite function (mmiscapi.h)

The mmioWrite function writes a specified number of bytes to a file opened by using the mmioOpen function.

LONG mmioWrite(
  HMMIO            hmmio,
  const char _huge *pch,
  LONG             cch
);

hmmio

File handle of the file.

pch

Pointer to the buffer to be written to the file.

cch

Number of bytes to write to the file.

Returns the number of bytes actually written. If there is an error writing to the file, the return value is -1.

The current file position is incremented by the number of bytes written.